Question

What is the equation of this graphed line?

Answer 1

`y=-(9)/(8) x+7`

Explanation:

The slope is found by doing the equation
`(rise)/(run)`. When looking at the first two points, it's shown that the rise (difference between the two y values) is -9 (since it decreased by 9) and the run (difference between the two x values) is 8 (since it increased by 8). This makes the slope equal
`-(9)/(8)`.

The y intercept is found by looking at the y value when x = 0. In this picture, it is clear that it is 7.

The equation you want to use is y = mx + b , where b is the y intercept and m is the slope. Just plug in the numbers and you got your equation!